/*
 * DBeaver - Universal Database Manager
 * Copyright (C) 2010-2025 DBeaver Corp and others
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.jkiss.dbeaver.ui.ai.model;

import org.jkiss.dbeaver.DBException;
import org.jkiss.dbeaver.model.runtime.DBRProgressMonitor;
import org.jkiss.utils.function.ThrowableFunction;

public class CachedValue<T> {
    private volatile T value;

    private final ThrowableFunction<DBRProgressMonitor, T, DBException> supplier;

    public CachedValue(ThrowableFunction<DBRProgressMonitor, T, DBException> supplier) {
        this.supplier = supplier;
    }

    public T get(DBRProgressMonitor monitor, boolean refresh) throws DBException {
        if (value == null || refresh) {
            synchronized (this) {
                if (value == null || refresh) {
                    value = supplier.apply(monitor);
                }
            }
        }
        return value;
    }
}
